# HS code 3103.11: Superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)

> HS code 3103.11 covers superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5). It sits in heading 31.03 (mineral or chemical fertilisers, phosphatic) in chapter 31 (fertilisers). Other goods of heading 31.03 are classified under 3103.19 (superphosphates, other) or 3103.90 (other). National tariff lines under 3103.11 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/310311
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 31](https://border.bot/hs-codes/31) / [31.03](https://border.bot/hs-codes/3103) / [3103.11](https://border.bot/hs-codes/310311)

## Key facts

- HS code: 3103.11
- Covers: Superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)
- Heading: [31.03: Mineral or chemical fertilisers, phosphatic](https://border.bot/hs-codes/3103)
- Chapter: [31: Fertilisers](https://border.bot/hs-codes/31)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/310311)

## What this code covers

HS code 3103.11 covers superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5).

The legal text of the subheading is “Superphosphates: Containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)”, read under “Superphosphates”, in HS2022.

## What it doesn’t cover

Other goods of heading 31.03 are classified under 3103.19 (superphosphates, other) or 3103.90 (other).

- [3103.19](https://border.bot/hs-codes/310319) Superphosphates: Other
- [3103.90](https://border.bot/hs-codes/310390) Other

## How it is structured

3103.11 is a six-digit subheading. Its first two digits, 31, are the chapter; the first four, 3103, are heading 31.03; the last two, 11, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 31: Fertilisers
- Heading 31.03: Mineral or chemical fertilisers, phosphatic
- Within the heading: Superphosphates
- Subheading 3103.11: Containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)

## In other countries

National tariff lines under 3103.11 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/310311): 1 line, used by 1 other country

- Previous subheading: [3102.90](https://border.bot/hs-codes/310290) Other, including mixtures not specified in the foregoing subheadings
- Next subheading: [3103.19](https://border.bot/hs-codes/310319) Superphosphates: Other

## Frequently asked questions

### What does HS code 3103.11 cover?

HS code 3103.11 covers superphosphates, containing by weight 35 % or more of diphosphorus pentaoxide (P2O5).

### Which heading and chapter is HS code 3103.11 in?

HS code 3103.11 is in heading 31.03 (mineral or chemical fertilisers, phosphatic) in chapter 31 (fertilisers).

### Where are goods of heading 31.03 classified when 3103.11 doesn’t fit?

Other goods of heading 31.03 are classified under 3103.19 (superphosphates, other) or 3103.90 (other).

### Which countries’ tariffs list national lines under HS code 3103.11?

National tariff lines under 3103.11 are live on border.bot for the United States (1 line, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Machine-readable: https://border.bot/hs-codes/310311.json